User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0 Build ID: 20160123151951 Steps to reproduce: -Create new Firefox 44 profile -Options ->Options ->Privacy -> Use custom settings for history ->Keep cookies until i close Firefox AND clear history when firefox closes ->Settings for Clearing History ->"Form &Seach History" -enter some search words in searchbox and open sarch (in google) -close firefox -open firefox -form and search history are not deleted Actual results: -Form&Search History are not deleted Expected results: -Form&Search History should be deleted See my Attachments for correct behavior in firefox 43.0.4 and uncorrect behavior in firefox 44 PS: on firefox 44: if i close and open firefox again and again, sometimes the form&sarch history is deleted, but on my working profile (where i have some extensions installed) it deletes it never on exit since firefox 44 (only for better demonstration in attachments i created a portable firefox 43.0.4 and 44.0. But the behavior on an installed firefox is the same)